Feeding device for stay-applying machines.



H. DE SMITH.

FEEDING DEVICE FOR STAY APPLYING MACHINES.

APPLICATION FILED AUG.5, l9i6. L fifil' o H. DE SMITH.

FEEDING DEVICE FOR STAY APPLYING MACHINES.

7 APPLICATION FILED AUG-5. I9I6. V L 5 mao Patented May 8,1917.

2 SHEETS-SHEET 2.

UNITED srnras Parser @FFKGE.

HENRY DE SMITH, OF ROCHESTER, NEW YORK, ASSJiGNOR TO M. D. KNOWLTQN COMI- PANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

FEEDING- DEVICE FOR STAY-APPLYING MACHINES.

Specification of Letters Patent.

. Patented May 8, rear.

' Appiication filed August 5, 1916. Serial Ho. 113,265.

T 0 all whom it may concern:

Be it known that ii, HENRY DE SMITH, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Feeding Devices for Stay-Applying Machines, of which the following is a specification.

My invention relates to that class of machines adapted for applying stays or reinforcing strips to the corner joints of boXes made of paperboard or like material, in which are embodied stay-strip applying means and stay-strip feeding means; the said feeding means being operative to feed a stay-strip from a supply roll to said applying means to be operated upon thereby in usual and well known manner.

The feeding means in most common use in this class of machines comprise a reciprocating strip-engaging device and means for operating the same in a manner whereby it will be caused on its forward feeding stroke to engage and carry forward the strip and then become released from said strip at the limit of its forward stroke so as to move backwardly without producing any corresponding backward movement of the strip. Such feeding device comprises a carrier having mounted thereon two cooperating grip: ping members arranged to permit of the passage of the stay-strip therebetween, one of which members is stationary with respect to the carrier and the other pivoted for movement to and from a gripping position relative to said' stationary member. Connected with this movable gripping. member is an actuating means which, in the operation of the machine, first rocks said member into gripping engagement with the strip, and then, by a continued movement, imparts a forward stroke to the complete feed device. Such forward stroke of the feed device determines the forward feeding of the staystrip. To produce accurate feeding, 'it is obvious that the upper pivoted gripping member should be'caused to firmly grip thestay-strip before the feed device begins its forward or feeding stroke and to maintain such grip until the completion of said stroke. To accomplish this in a simple and efficient manner has been the main ObJQCt of my present invention, and this object I attain by the novelconstruction, arrangement and c0mbi-' nations of Pa ts hereinafter described and claimed and as illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a stay-applying machine provided with my invention.

Fig. 2 is an enlarged plan view of the feed device and its support removed from the machine, the upper gripping member of the device being in section on the line 22 of Fig. 1.

Fig. 3 is a view similar to Fig. 2, showing a different position of the parts.

Fig. 4 is an enlarged rear elevation of the feed device, with the crank arm carried by the upper gripping member partly broken away to show av cooperating member onthe brake spring, and also showing in full and broken lines the positions of certain of the parts with the upper gripping member in strip-releasing and strip-engaging positions respectively.

Fig. 5 is an enlarged front elevation of the feed device with the upper gripping member in strip-engaging position.

Similar reference characters indicate like parts in the several figures of the drawings. The machine here shown as provided with my invention is a Stayer of well known construction and operatlon, and therefore will be only briefiy'described herein.

The several parts constituting the machine are mounted upon a suitab e supporting frame, indicated generally by the reference numeral 2. In the upper part of this head 7 which isaetuated from a'crank-pin 'onthe drive shaftB through the medium of a pitman 8, in usual manner.-

In the operation of the machine, the staystrip, indica at s, is adapted to be' fed from a supply reel (not shown) to a position between said presser dies, by a suitable feed device. This feed device comprises a reciprocatory carrier-plate} slidably conn cted with a t ti na y-we rer Q a of the machine is the The movl of the device, and to release the strip at the limit of said forward stroke and maintain such release during the return stroke of the device. Such operation of the feed device is effected in the present case by means of an actuating lever 13, pivoted at its upper end to the frame at 14, and at its lower end connected through a link 15 with a lever arm 16 of the pivoted member 12. The lever 13 is given its forward throw by a cam 17 on the shaft 2 engagin a roll 18 thereon, and is given its return t row by a connecting spring 19., Upon the forward throw of the lever 13, the'member 12 is first caused to rock downward into gripping engagement with the strip lying over the lower member, as shown in Fig. 5, after which, the continued movement of the'lever effects an advance of the feed device-comprising the carrier 9 and supported members-and engaged strip. After the lever has swun forward a predetermined distance, -it is then retracted, thereby operating to first raise the member 12 to strip-releasing position by rocking its arm16 intocontact with a stop projection 20 on the carrier plate 9, as shown in Fig. l, nd then returning the feed device to its starting position.

The machine as thus far described is-of usual construction and operation and does not require a more detailed description for the proper understanding of my present invention.

The carrier 9 as here shown is provided at its rear side with a supporting and guiding rib 21 which is fitted to slide within an open elongated slot 22 in the guide-plate 10. As

a means for retarding the carrier 9 against feeding movement until its gripping jaw or member 12 has been moved into strip-engaging position, it is held in frictional engagement with one side of the guide-plate 10 by means of a sliding shoe'23 at the opposite side of said guide-plate, with which it is yieldingly and adjustably connected by.

means to be presently described.

The up or gripping member 12 as here shown is 25, which is journaled in an opening'in the carrier 9. This shaft at its rear end extends loosely through an opening in the shoe 23 to a point beyond the latter, where it is provided with a rigidly connected crank arm xed on the front end of a shaft 27. Interposed between the shoe 23 and the hub 28 of the crank arm 27 is a curved platespring 29 which is normally held under tension between said parts as shown in Fig. 2, to thereby yieldingly hold the carrier 9 and the shoe 23 in frictional engagement with the adjacent sides of the guide-plate 10, that is, the outward pressure of the spring against the hub 28 holds the carrier 9 against the adjacent front side of the guide-plate, while the inward pressure of the spring against-the shoe 23 holds the latter against the adjacent or rear side of the guide-plate. The friction thus produced between the engaging parts may be adjusted for the proper control of the feed carrier on the guideplate in the normal operation of the machine. It sometimes happens, however, particularly after the parts have become worn and "the original adjustment thereby destroyed, that the pivoted gripping member 12 after being initially brought into engagement with the strip, rebounds fromthe strip and then moves forward slightly before it again positively grips the strip, or it may lose its hold on the strip when bro'ughtinto engagement therewith, then move forward slightly and then grip again. This in either event obviously means short and irregular feeding of the strip. Therefore, in accordance with my resent invention, I provide a means that, W111 operate during each feed stroke 'of the device to so increase the action of the braking means that the movable gripping member 12 will be caused to maintain its gripping relation with the strip throughout the complete feed stroke. This means comprises the said crank arm27 which, upon the rocking of the connected gripping member 12': to strip-engaging position preliminary to the commencement of the feed stro'ke,yis moved to a position to engage with a cam projection 30 on the spring 29, as shown in Fig. 3, and place said spring under further tension whereby it will act to increase the friction between the engaging parts 9, 10, and 23. This increased action of the braking device will so retard the movement of the carrier 9 that the gripping member 12-wil1 be firmly held to its gripping position throughout the complete feed stroke of the device. when the gripping member is rocked backward to strip-releasing position, the crank arm 27 is at the same time rocked to springreleasing position, as shown in Fi .2 and 4, whereby the action of the braking device ward or idle stroke of the feed device and with greatly reduced wear to the parts.

Asa means for varying the tension placed on the brake spring 29 b the crank arm 27 and thereb the action 0 the braking device on the guide-plate, the crank arm is provided with a screw 31'as an adjustable cm- At the end of said stroke and will be substantially reduced on the backtact device for engagement with the cam projection on the spring 29. By turning this screw in the proper direction, it will be obvious that the action of said spring and thereby the braking device may be adjusted to a nicety.

In the engagement of the spring 29 and crank arm 2? during the feed stroke of the feeding device as described, it Will be understood that the pressure of the spring against the crank arm through the parts 30 and 431 will also serve as a means to yieldingly hold the gripping member 12 to its lowered gripping position and against rebound from that position.

The shoe 23 and brake spring 29 are connected with the carrier 9 by the shaft 25 engaging the same between their ends. In addition to the support afforded by this shaft, the said shoe and spring are also supported adjacent their ends by means of pins 32, 32, on. the carrier loosely engaging the same within openings therein, as shown.

Having now described and illustrated one embodiment of my invention, it will be obvious that the same maybe more or less substantially modified Without departing from the spirit or scope of the same as defined in the accompanying claims.

Whit I claim is 1. In a machine of the class described, strip feeding means comprising, a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cooperating gripping members, a braking device for retarding the movement of the carrier on the guide-plate, and means for actuating said braking device and subsequently releasing the same at predetermined times in the Working stroke'of thecarrier, I

2. In a machine of the -class described,

strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plateand supporting a pair of coiiperating gripping members, a braking device for retarding the movement of the carrier on the guide-plate, and means for actuating said braking device prior to the commencement of the feed stroke of the carrier and releasing the same at the end of said feed stroke. I p

3. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cooperating gripping members, a braking device for retarding the movement of the carrier on the guide-plate, and means. maintaming said braking device in operation.

during the feed stroke of the carrier and releasing the same during the return stroke of the carrier.

4. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on 1 carrier on the 'uidc-olate means normall h 7 maintaining said braking device in opera tion, and supplemental means for increasing the action of the braking device prior to the commencement of the feed stroke of the carrier and releasing the same at the end of said feed stroke.

6. In a machine of the class described, strip feeding means comprising a guide- 'plate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cooperating gripping members,-a braking device for retarding the movement of the carrier on the guide-plate, means normally maintaining said braking device in operation, and supplemental means for increasing the action of the braking device during the feed stroke of the carrier and releasing the same during return stroke of the carrier.

7. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cooperating gripping members one of which is movable to and from a gripping position relative to the other, actuating means for moving said movable gripping member to and from its gripping position, a braking device for retarding the movement of the carrier on the guide-plate, and means carried by said movable gripping member for actuating said braking device and subsequently releasing the same at predetermined times in the Working troke of the carrier.

8. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cooperating gripping members one of which is movable to and from a gripping position relative to the other, actuating means moving said movable gripping member to and from its gripping position, a braking" device for retarding the movement of the 1 carrier on the guide-plate, and means car-. ried by said movable gripping member for actuating said braking device upon the feed stroke of the carrier and releasing thesame upon the return stroke of the carrier 9. In a machine of the class described,

ice

120 for strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a pa1r of coeperating gripping members, a braking device for retarding the movement of the carrier on the ide-plate, means for actuating saidbrakmg device and subsequently releasing the same at predetermlned times in the working stroke of the carrier, and adjusting means for regulating the braking action of the braking device.

10. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cooperating grippin members one of Which is movable to and mm a gripping position relative to the other, actuating means for moving said movable gripping member to and from its gripping position, a braking device for retarding the movement of the carrier on the guide-plate, means carried by said movable gripping member for actuating said braking device and subsequently releasing the same at predetermined times in the working stroke of the carrier, and adjusting means tor regulating the braking action of the braking device.

11. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting apair of cooperatin gripping members one of which is pivoted or movement to and from its gripping position, and a braking device for retarding the movement of the carrier on the uide-plate, the said pivoted gripping memer being rovided with a crank arm for operating the braking device upon the movement of the gripping member to gripping position and for releasing said braking device upon the movement of the gripping member to strip-releasin position.

12. In a machine of he classdescribed, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a air of cotiperating gripping members one of which is pivoted for movement to and from its gripping position and a braking device comprising a spring i' or retarding the movement of the carrier on the pivoted grip ing mem or being provided With a cran arm for compressing said spring and thereby 'operatin the brafing device upon the movement 0 the grip ing member to grippin osition and for re easing said spring an t ereby the brafing device upon the movement of the a member to strip releasing position.

Qide-plate, the said naeepie plate, a reciprocating carrier mounted on said guide-plate and supporting a pair of cotiperating gripping members one of which is pivoted for movement to and from its gripping position and is provided With a crank arm, and a spring connected with said carrier for engaging said crank arm upon the movement of the gripping member to gripping position and yleldingly holding said member to that position.

15. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a air of coiiperating gripping members one 0 which is pivoted for movement to and from its gripping position and is provided with a crank arm, and a braking device for retarding the movement of the carrier on the guide-plate, said braking device embodying a spring operative to e gage said crank arm upon the movement of he gripping member to gripping position and yieldingly holding said member to that position.

16. In a machine of the class described, strip feeding means comprising a guideplate, a reciprocating carrier mounted on said guide-plate and supporting a air of codperating gripping members one 0 which is pivoted for movement to and from its grip ing position and is provided with a cran arm, and aspring connected'with said carrier for enga ing said crank arm upon the movement of the gripping member to gripping position and yieldingly. holding said member to that position, and adjusting means for regulating the action, off-the spring on the scribed.

Signed-El? i the county Monroe, and State of Id'ewYork, this 24th day of JulygA, 1816. I

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